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Design and Analysis of a Bézier Curve-Based Variable Cross-Section Magnetoelectric Antenna
Gang Li1, Naijun Zhao2, Jiangang Li1
1Qinghai Third Road and Bridge Construction Co., Ltd., Xining 810001, China.
Materials (Basel, Switzerland)
|August 13, 2026
Summary
This study introduces a novel Bézier curve-based magnetoelectric (ME) antenna with a tunable shape. The new design enhances performance and reduces resonant frequency for miniaturized, efficient antennas.
Area of Science:
- Antenna Engineering
- Materials Science
- Electromagnetics
Background:
- Conventional antennas face miniaturization vs. efficiency trade-offs.
- Magnetoelectric (ME) antennas offer solutions but lack structural tunability.
- Existing ME antennas require performance enhancement and design flexibility.
Purpose of the Study:
- To propose a novel Bézier curve-based (BCB) magnetoelectric antenna.
- To introduce a shape tuning factor for geometric configuration and frequency tuning.
- To enhance antenna performance, including converse ME (CME) coupling and radiation efficiency.
Main Methods:
- Developed a Bézier curve-based (BCB) antenna with a variable cross-section.
- Utilized the lumped-mass method to derive the resonant frequency-shape tuning factor relationship.
- Established a nonlinear multi-field coupled numerical simulation model for performance prediction.
Main Results:
- The BCB design reduces resonant frequency and enhances CME coupling and far-field radiation.
- Achieved minimum resonant frequencies of 7.2 kHz (clamped) and 11.1 kHz (free).
- Improved CME coupling by 124% (clamped) and 140% (free) without increasing volume.
Conclusions:
- The BCB ME antenna offers structural tunability and improved performance.
- The shape tuning factor provides precise geometric control for frequency tuning.
- The proposed design validates analytical models and enhances antenna capabilities.
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